Nexperia USA Inc. 74ALVC573D,112

Overview

74ALVC573D,112 from Nexperia is an octal D-type transparent latch with 3-state outputs, designed for data latching and bus isolation in low-voltage digital systems. It operates across 1.65 V to 3.6 V supply, features independent latch enable (LE) and output enable (OE) controls, Schmitt-trigger inputs for noise immunity, and IOFF circuitry for partial power-down protection. Used in address/data bus buffering and microcontroller I/O expansion.

For engineers reviewing the 74ALVC573D,112 datasheet, 74ALVC573D,112 pinout, 74ALVC573D,112 application, or 74ALVC573D,112 equivalent, key selection criteria include its 20-pin SO20 package, -40 °C to +125 °C operating range, sub-4 ns propagation delay at 3.3 V, IOFF-enabled hot-swap capability, and compatibility with TTL-level inputs.

Technical Context

This device implements eight independent D-type latches with transparent mode when LE is HIGH and edge-triggered capture on LE HIGH-to-LOW transition. Each latch output drives a 3-state buffer controlled solely by OE - enabling or disabling all outputs without affecting internal latch states.

Schmitt-trigger inputs ensure robust operation with slow-rising signals, while the IOFF circuit actively disables outputs during power-down to prevent backflow current. The design complies with JEDEC standards JESD8-7, JESD8-5, and JESD8C/JESD36 across its full voltage range.

Key Specifications

Pinout & Package

74ALVC573D,112 is supplied in a plastic small outline package (SO20), SOT163-1, with 20 leads and 7.5 mm body width. Pin 1 is marked by a bevelled corner or notch; pin 10 is GND, pin 20 is VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transparent latch applications.

Compared with SN74LVC573APWR and 74LVC573AD,118, the 74ALVC573D,112 uniquely delivers IOFF-enabled partial power-down, full -40 °C to +125 °C qualification, and superior noise immunity - making it the sole choice for industrial hot-plug and extended-temperature bus isolation.

Availability

74ALVC573D,112 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, microcontroller bus buffering, memory address latching, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ALVC573D,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVC series targets low-voltage, high-speed digital interfacing with emphasis on robustness, power efficiency, and mixed-signal compatibility - specifically engineered for next-generation industrial control and communications infrastructure.

FAQ

What is the maximum clock frequency supported by the 74ALVC573D,112?

The 74ALVC573D,112 does not operate on a clock signal; it is a transparent latch controlled by asynchronous LE and OE inputs. Its usable data rate is determined by propagation delay (≤3.8 ns at 3.3 V) and setup/hold times (≥0.8 ns), supporting reliable operation in systems with bus cycle times down to ~10 ns - equivalent to effective throughput exceeding 100 MHz in burst-mode applications.

Can the 74ALVC573D,112 be used with a 5 V microcontroller interface?

No - the absolute maximum input voltage is +4.6 V, but recommended operation limits inputs to ≤3.6 V. Direct connection to 5 V logic violates the 3.6 V VI(max) specification and risks damage or latch-up. A level translator (e.g., TXB0108) or resistor-divider network must be used to reduce 5 V signals to ≤3.6 V before connecting to Dn, LE, or OE inputs.

Does the 74ALVC573D,112 support hot-swap insertion while VCC is unpowered?

Yes - the integrated IOFF circuitry actively disables outputs and blocks reverse current flow when VCC = 0 V, allowing safe insertion into a live backplane. Measured IOFF leakage is ≤±80 μA at 3.6 V applied to inputs/outputs, meeting IEC 61000-4-2 and system-level hot-swap requirements for modular industrial hardware.

How does the Schmitt-trigger input improve system reliability?

Schmitt-trigger inputs provide hysteresis (~0.5 V at 3.3 V), eliminating metastability and false triggering caused by slow-rising or noisy signals such as mechanical switch debouncing, long PCB traces, or unterminated stubs. This ensures clean, jitter-free LE and OE transitions - critical for deterministic latching in real-time control loops and test instrumentation.